I guess it all depends how bright you are as to how easy you will find the learning.
However - and this is the good bit, I know quite a few ATPLs who are as thick as pig-$hit but have just knuckled down and learnt what is required, replicated it for the exam then promptly dumped the brain-store.
If you want it bad enough, you'll pass. As an ex fish-head you can't be super-dumb or you'd have joined the army!
Good luck!
Stik